The Real Math of Repair vs. Replace for Industrial Electronics

"Just buy a new one" was reasonable advice in 2015. Three numbers explain why plants increasingly repair instead — and when replacing is still right.

Number 1: What an hour of downtime costs

ABB's 2023 Value of Reliability survey (3,215 plant-level respondents) put unplanned downtime at an average of $125,000 per hour globally — about $103,000 per hour for US respondents. Siemens' True Cost of Downtime 2024 report goes further for heavy industry: automotive plants losing $2.3 million per hour. Even if your operation runs at a tiny fraction of those figures, the arithmetic dominates every other number in this decision: the difference between a 4-day repair and a 4-week replacement lead time is measured in multiples of the hardware cost.

That's why the speed of the path back to production — not the invoice — is the first-order term.

Number 2: What replacements actually cost and when they arrive

The sticker is only the start:

• Lead time. Post-2021 supply chains never fully snapped back for industrial electronics — drives and HMIs still routinely quote weeks, with industrial HMI lead times reported at 12–16 weeks during 2025's tariff and component crunches.
• The configuration project. A new HMI needs the application converted and loaded; a new drive needs parameters, tuning, and often firmware alignment; a new PLC module wants the right revision. That's engineering hours plus a commissioning window — and on validated lines (food, pharma), a change-control process on top.
• The discontinued trap. For PanelView Plus 6, PLC-5, SLC 500, Simodrive 611, Indramat, and legacy FANUC, there is no new unit at any price. The "replacement" is either a used gamble or a migration project measured in tens of thousands.

Repair, by contrast, is typically 15–50% of replacement cost (the range repair vendors and market data consistently show) and returns the same configured unit — no conversion, no re-validation, no revision roulette.

Number 3: The failure profile of the hardware itself

Industrial electronics fail predictably: electrolytic capacitors dry out, backlights burn their hours, touch layers wear at the most-pressed spots, power semiconductors let go after years of thermal cycling. These are exactly the failures board-level repair addresses with new components — meaning a properly repaired unit isn't a patched old unit so much as a unit with fresh wear items. It's why we can put a 24-month warranty on repairs.

When replacement genuinely wins

Honesty keeps this useful:

• Commodity current-production hardware with no configuration — a $250 in-stock drive with default parameters isn't worth a $300 repair.
• Fire, flood, or catastrophic overvoltage across every board — evaluated honestly, refunded when unrepairable.
• A platform you were already funding a migration for — sometimes the failure is simply the go signal. (Though even then, a repair often buys the time to migrate on your schedule instead of the machine's.)
• Safety-rated controllers — replace per your safety program, full stop.

The rule of thumb

Ask three questions: Is the machine down or at risk? Does the unit carry configuration my team would have to rebuild? Is the replacement discontinued, long-lead, or four figures? One yes = get a repair quote before ordering anything (ours are free). Two or three yeses = repair is almost certainly the fast, cheap, low-drama answer.

And if you send it to us and the honest answer is "replace it" — that's what the evaluation will say, and it will have cost you nothing to learn.